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Establishment of a Cre/loxP recombination system for N-terminal epitope tagging of genes in Tetrahymena.

ABSTRACT:

Background

Epitope tagging is a powerful strategy to study the function of proteins. Although tools for C-terminal protein tagging in the ciliated protozoan Tetrahymena thermophila have been developed, N-terminal protein tagging in this organism is still technically demanding.

Results

In this study, we have established a Cre/loxP recombination system in Tetrahymena and have applied this system for the N-terminal epitope tagging of Tetrahymena genes. Cre can be expressed in Tetrahymena and localizes to the macronucleus where it induces precise recombination at two loxP sequences in direct orientation in the Tetrahymena macronuclear chromosome. This Cre/loxP recombination can be used to remove a loxP-flanked drug-resistance marker from an N-terminal tagging construct after it is integrated into the macronucleus.

Conclusions

The system established in this study allows us to express an N-terminal epitope tagged gene from its own endogenous promoter in Tetrahymena.

SUBMITTER: Busch CJ

PROVIDER: S-EPMC2912859 | biostudies-literature | 2010 Jul

REPOSITORIES: biostudies-literature

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Establishment of a Cre/loxP recombination system for N-terminal epitope tagging of genes in Tetrahymena.

Busch Clara Jana-Lui CJ Vogt Alexander A Mochizuki Kazufumi K

BMC microbiology 20100713

<h4>Background</h4>Epitope tagging is a powerful strategy to study the function of proteins. Although tools for C-terminal protein tagging in the ciliated protozoan Tetrahymena thermophila have been developed, N-terminal protein tagging in this organism is still technically demanding.<h4>Results</h4>In this study, we have established a Cre/loxP recombination system in Tetrahymena and have applied this system for the N-terminal epitope tagging of Tetrahymena genes. Cre can be expressed in Tetrahy ...[more]

PMID: 20626890

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